Hearing aid



FIG. 1 is a top perspective view of a hearing aid of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a first side view thereof;

FIG. 5 is a second side view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a bottom view thereof.

The broken line showing of hearing aid is included for the purpose of illustrating environment and forms no part of the claimed design. 

I claim the ornamental design for a hearing aid, as shown and described. 